要做的事
+ @3 k* e- T6 K6 N# Y通过STM32自带的12位ADC模块读取8通道电压信号，并将其通过USART1发送出来
8 C1 `. K, X! X7 V7 l- w
: r8 ~& M  k& S, a! MSTM32Cube的USART1配置
/ `. w3 Q) t% J, X, }  b5 XUSART1总体配置
& `3 w6 x, U* A- Q* ^4 A3 t( mUSART1的配置如下图所示
+ L, q4 P  F" m; j波特率初始化为115200，后续可以再进行修改
" o1 T8 g" t8 _  @


. u, U- l3 T" @( w% e9 \/ k# z
4 M+ {$ C% d# @5 T3 QUSART1引脚配置
USART1的引脚配置如下

: G1 t5 N0 R- ]9 e  p/ EPA10为USART1的RX

: `  t: ^! ?) x  z: M* J$ NPB6为USART1的TX
" I6 `; y* Z( A0 N, A. x
6 m$ }7 y3 T  A0 ~& C3 e2 n/ o7 y
6 a/ R! A) _4 P
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fputc重定向
重定向完成后，在.c文件的开头或对应的.h文件中include <stdio.h>即可使用printf函数

7 C# T  c/ Q3 j8 O
4 ~" m' S. g/ q2 a2 V7 {, h% e
! ^& X+ p, W! W2 s! I# bUSART1接收
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4 `8 o# w8 ?- G' o) V% Z
! }* r3 u0 d: z6 {) Y1 U6 V重写中断服务函数HAL_UART_RxCpltCallback



4 Z# @2 {* Q. Z: A2 a) I; M 自定义一个Clear函数

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9 D1 v9 x5 Q- e
我们需要在几个地方extern一下，一个是usart.h一个是main.c

$ a. s/ O" O8 q# n, A

% F* I& @+ J$ W# y' C3 }# i- c6 ^

0 b  R  k0 I# g% x% L& {0 L6 ]. u) M这里附上相关代码
$ ?' ~; Q  K+ r7 V! u* r
首先是usart.h
, p! d4 a7 z2 M

1. /* USER CODE BEGIN Header */
   
2. /**
   
3.   ******************************************************************************
   
4.   * @file    usart.h
   7 |; o5 M1 W# \& P5 w/ W& E6 e" B
5.   * @brief   This file contains all the function prototypes for
   
6.   *          the usart.c file
   9 T4 B; ]0 V1 u5 B% P; d! P
7.   ******************************************************************************
   
8.   * @attention
   5 F- o  P. b2 b1 n2 E& @) u, R
9.   *
   4 Q; D% O& s) n5 k
10.   * Copyright (c) 2022 STMicroelectronics.
    
11.   * All rights reserved.
    
12.   *
    * H( Z) T' R0 l: N: w$ W# x2 u4 r
13.   * This software is licensed under terms that can be found in the LICENSE file
    6 H/ W" O6 \% U  C- `
14.   * in the root directory of this software component.
    
15.   * If no LICENSE file comes with this software, it is provided AS-IS.
    ' R8 C$ r: {6 I9 r1 `/ n
16.   *
    & Y# ?; O( n2 v+ k7 V! h
17.   ******************************************************************************
    
18.   */
    
19. /* USER CODE END Header */
    $ P+ d2 U9 ]3 t% I
20. /* Define to prevent recursive inclusion -------------------------------------*/
    ; U) D$ W* Z! T
21. #ifndef __USART_H__
    2 d" U* P$ b  s3 R/ v: g
22. #define __USART_H__
    ) H$ f$ j: ]9 M4 ~* g2 `, I) S
23. 
    - W4 X' z$ F# e8 f% C! Z) g/ [
24. #ifdef __cplusplus
    
25. extern "C" {
    
26. #endif
    
27. 
    , c7 K& |! ~, y' M, {9 c1 l
28. /* Includes ------------------------------------------------------------------*/
    
29. #include "main.h"
    
30. 
    
31. /* USER CODE BEGIN Includes */
    5 m+ x+ o8 U4 b; @
32. #define USART_REC_LEN                          200          //定义最大接收字节数 200
    ' j* z2 ^- ~* N5 o9 A
33. 
    
34. extern uint8_t USART_RECEIVE_CHAR;
    
35. extern uint8_t USART_RECEIVECOMPLETED;
    
36. extern uint8_t USART_COUNT;
    + b, }1 ?4 J/ O  d
37. extern uint8_t USART_RX_BUF[USART_REC_LEN];
    
38. /* USER CODE END Includes */
    % S, B5 m1 X) N
39. 
    
40. extern UART_HandleTypeDef huart1;
    
41. 
    
42. /* USER CODE BEGIN Private defines */
    
43. 
    
44. /* USER CODE END Private defines */
    , C" x; \* [) W* q* x/ \. b
45. 
    
46. void MX_USART1_UART_Init(void);
    ) q4 w9 x3 x" u% R) _. m7 q
47. 
    , K9 J( ]% w7 G2 f% x
48. /* USER CODE BEGIN Prototypes */
    ' M+ P( \( I5 C) O6 @3 o: K' v/ x
49. void ClearUSARTReceiveBuffer(void);
    
50. /* USER CODE END Prototypes */
    
51. 
    
52. #ifdef __cplusplus
    
53. }
    
54. #endif
    8 l( m" A3 \- S
55. 
    
56. #endif /* __USART_H__ */
    

复制代码

) ~( c/ R2 i' l9 y  Uusart.c

1. /* USER CODE BEGIN Header */
   4 n) m3 m# o/ V; h
2. /**
   ) V: p7 }) B$ {, r# c. L  N0 o! C; s4 t
3.   ******************************************************************************
   
4.   * @file    usart.c
   
5.   * @brief   This file provides code for the configuration
   # C9 j+ y/ h! ^5 {+ b/ e
6.   *          of the USART instances.
   
7.   ******************************************************************************
   9 s( ?! m( L- l; J5 X
8.   * @attention
   2 y" v3 ]0 K" i" K) @; g$ j
9.   *
   1 |1 M; R; b9 M; y
10.   * Copyright (c) 2022 STMicroelectronics.
    ; h1 N6 _3 n$ x4 p& x) ~3 g$ i
11.   * All rights reserved.
    
12.   *
    : O3 D  [3 H, C7 X
13.   * This software is licensed under terms that can be found in the LICENSE file
    : Q" H- |3 ^6 O! k0 m
14.   * in the root directory of this software component.
    * ~# T6 V* L  f& C
15.   * If no LICENSE file comes with this software, it is provided AS-IS.
    3 r- R  E( \, q2 C1 {4 P
16.   *
    2 ~" U; x) q2 T# N
17.   ******************************************************************************
    5 K/ j3 I3 g& F5 {
18.   */
    
19. /* USER CODE END Header */
    
20. /* Includes ------------------------------------------------------------------*/
    7 c) k( o7 K& {& `
21. #include "usart.h"
    4 j1 ^" W' P* e: w6 T% s
22. 
    / c  d2 E% T) ?' t
23. /* USER CODE BEGIN 0 */
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24. #include "stdio.h"
    
25. #include <string.h>
    5 [. e, o' v( H: I  G
26. 
    
27. uint8_t USART_RECEIVE_CHAR = 0;
    
28. uint8_t USART_RECEIVECOMPLETED = 0;// 1 Completed    0 Incompleted
    % E3 a0 e( C+ h. y
29. uint8_t USART_COUNT = 0; // 接收的字符数
    + o2 F& I3 e! g, @( {5 W. Z+ ~; k
30. uint8_t USART_RX_BUF[USART_REC_LEN] = {0};
    
31. /* USER CODE END 0 */
    $ |( @0 r8 `9 y+ ?$ N% n
32. 
    
33. UART_HandleTypeDef huart1;
    
34. 
    
35. /* USART1 init function */
    
36. 
    ! H& v' B8 T$ ?+ U% r$ j
37. void MX_USART1_UART_Init(void)
    
38. {
    / a# a& h# t. O$ ?' h: h
39. 
    
40.   /* USER CODE BEGIN USART1_Init 0 */
    
41. 
    
42.   /* USER CODE END USART1_Init 0 */
    $ F& h  j; U5 ?0 i( E6 R
43. 
    ( X+ m9 F  W$ k" `  i1 Z/ M( y" x8 Q
44.   /* USER CODE BEGIN USART1_Init 1 */
    4 K' F; o# t* w
45. 
    ! B! e# M: p: h8 z
46.   /* USER CODE END USART1_Init 1 */
    ) I9 r, {1 O2 ?+ }. p* j
47.   huart1.Instance = USART1;
    ( c% K, V5 j& _
48.   huart1.Init.BaudRate = 115200;
    8 ?& m! R/ Q3 {
49.   huart1.Init.WordLength = UART_WORDLENGTH_8B;
    & o% y( G& U- K7 S1 ?
50.   huart1.Init.StopBits = UART_STOPBITS_1;
    
51.   huart1.Init.Parity = UART_PARITY_NONE;
    
52.   huart1.Init.Mode = UART_MODE_TX_RX;
    : M+ x# [; F8 O5 u- q3 ]+ z
53.   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    5 i* s/ `6 c. A& W  P' |3 W9 X$ D
54.   huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    
55.   huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
    
56.   huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    - O$ B- C0 b: `+ F& R/ ^
57.   if (HAL_UART_Init(&huart1) != HAL_OK)
    % p0 j% L! I( G% \7 Y4 h
58.   {
    
59.     Error_Handler();
    
60.   }
    
61.   /* USER CODE BEGIN USART1_Init 2 */
    
62. 
    
63.   /* USER CODE END USART1_Init 2 */
    
64. 
    
65. }
    6 ]+ z" B' T- |
66. 
    
67. void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
    
68. {
    # B7 Z6 p8 K) G1 C. n
69. 
    # z. V( D& J, C$ \
70.   GPIO_InitTypeDef GPIO_InitStruct = {0};
    $ W3 a7 V8 N' C% e
71.   RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
    
72.   if(uartHandle->Instance==USART1)
    * H9 n" J) R8 _9 X- ?. c4 x8 x
73.   {
    * G% i' c  L6 C0 d
74.   /* USER CODE BEGIN USART1_MspInit 0 */
    
75. 
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76.   /* USER CODE END USART1_MspInit 0 */
    
77. 
    
78.   /** Initializes the peripherals clock
    + G6 a  W7 R- V
79.   */
    5 b6 P6 t- E5 R  U- u3 U: r  O  i. n1 c
80.     PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
    
81.     PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
      {% q  j! C3 q0 }1 k, V8 F9 K
82.     if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
    
83.     {
    
84.       Error_Handler();
    
85.     }
    * c1 [* c' D8 E5 [" a% ?
86. 
    + \: U/ o( n4 q1 u. {
87.     /* USART1 clock enable */
    & u! Y. J3 p9 m6 g, e
88.     __HAL_RCC_USART1_CLK_ENABLE();
    2 w4 u1 M' o/ K% m( Z- p
89. 
    ( v" n! h# R" C" _5 I6 {! N
90.     __HAL_RCC_GPIOA_CLK_ENABLE();
    ( o. c; \; Y% p
91.     __HAL_RCC_GPIOB_CLK_ENABLE();
    
92.     /**USART1 GPIO Configuration
    8 U" f$ Z8 v1 o+ }1 H  c
93.     PA10     ------> USART1_RX
    0 q: Q2 R5 A- b1 g: {
94.     PB6     ------> USART1_TX
    
95.     */
    " u% }& C# z+ ~- ?/ [0 y6 N
96.     GPIO_InitStruct.Pin = GPIO_PIN_10;
    
97.     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    
98.     GPIO_InitStruct.Pull = GPIO_NOPULL;
    2 W! M7 v- r# P' u' {8 j9 D+ K
99.     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    
100.     GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
     0 p4 D& z" ^1 a( g( o
101.     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
     
102. 
     4 l' e3 P: M% v, ?/ ?/ B
103.     GPIO_InitStruct.Pin = GPIO_PIN_6;
     - Y2 S6 t6 _, c; u+ ?! T' l
104.     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
     
105.     GPIO_InitStruct.Pull = GPIO_NOPULL;
     
106.     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
     1 @# Q. ]% s; ]+ H, n5 O, P! E0 d
107.     GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
     % A5 B8 f4 ^6 y) w1 T
108.     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
     
109. 
     1 A$ M& W' ?! W1 f# K
110.     /* USART1 interrupt Init */
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111.     HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
     - b, s: a( w: K% M, e$ M$ q
112.     HAL_NVIC_EnableIRQ(USART1_IRQn);
     6 X8 t  P$ Q0 [$ q/ Z1 {
113.   /* USER CODE BEGIN USART1_MspInit 1 */
     , w4 k# f, B4 k+ J1 m1 `3 k
114. 
     
115.   /* USER CODE END USART1_MspInit 1 */
     3 A$ ^1 O! Y! a% D; `
116.   }
     , y8 @8 J+ V! D) h! n: G
117. }
     
118. 
     , H% I8 J. k7 c% J
119. void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
     * p- O' \. R9 n/ Q
120. {
     
121. 
     & v4 K. A5 p* @$ R( B/ {
122.   if(uartHandle->Instance==USART1)
     
123.   {
     
124.   /* USER CODE BEGIN USART1_MspDeInit 0 */
     
125. 
     
126.   /* USER CODE END USART1_MspDeInit 0 */
     
127.     /* Peripheral clock disable */
       x, B, R# k/ i. ?, C$ g6 u* v) B
128.     __HAL_RCC_USART1_CLK_DISABLE();
     
129. 
     
130.     /**USART1 GPIO Configuration
     , G3 e6 s4 r* u4 q
131.     PA10     ------> USART1_RX
     
132.     PB6     ------> USART1_TX
     2 Q! G6 ?) `/ H3 t3 i3 m, b
133.     */
     
134.     HAL_GPIO_DeInit(GPIOA, GPIO_PIN_10);
     6 Q$ Y. c% o% p: O6 @
135. 
     9 y; ?' D5 X$ G8 k# A* p( `0 b5 I
136.     HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6);
     
137. 
     
138.     /* USART1 interrupt Deinit */
     / }  [1 v' j! I+ g
139.     HAL_NVIC_DisableIRQ(USART1_IRQn);
     / a0 Z# X' p) U! I2 k' ~- |
140.   /* USER CODE BEGIN USART1_MspDeInit 1 */
     
141. 
     
142.   /* USER CODE END USART1_MspDeInit 1 */
     
143.   }
     ( L4 }  s% T, f4 T! J
144. }
     
145. 
     6 J* Q* g9 m# g4 U* G
146. /* USER CODE BEGIN 1 */
     
147. // 重定向函数1
     
148. 
     1 v4 m8 i9 O2 @" \
149. // 注意这里重定向函数的写法
     $ r  R3 m2 k. ^/ z% [
150. int fputc(int ch,FILE *f)
     - q/ W7 B# K7 x* h1 W
151. {
     ; P7 R' E' g2 v& p9 v
152. // 另一种重定向函数写法
     
153. //        uint8_t temp[1]={ch};
     " k- ]: d. c0 d+ d. j& L! k
154. //                HAL_UART_Transmit(&huart1,(uint8_t*)&ch,1,0xFFFF); //UartHandle是串口的句柄
     
155. //                return ch;
     ( s1 }- [, p  w& B- k
156.        
     # v! J" Q' K, Y5 w
157.         // 可行的重定向函数写法
     
158.         while(!(USART1->ISR & (1<<7)));
     
159.        
     
160.         USART1->TDR = ch;
     
161.        
     
162.         return ch;
     
163. }
     
164. 
     ; f8 _. h8 c5 X; T7 b" P
165. // 重写串口中断服务函数
     3 b6 e5 }( r# o
166. void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
     # s1 X/ k" E: Z
167.         // 每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数
     
168.         if(USART_COUNT >= 200){
     " y) L+ d4 c$ K; B- \1 s
169.                 // 判断接收的字符串长度是否超过了最大缓冲区长度
     6 s1 p. x& Z( [- [0 l/ G# Q
170.                 printf("Overflow");// 若超出最大长度则输出Overflow
     
171.                 memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
     ( E2 S9 Q5 A9 J. X, _$ R% \
172.                 USART_COUNT = 0;
     
173.         }else{
     0 m' C6 j; l% l# F% B0 O0 ?
174.                 USART_RX_BUF[USART_COUNT] = USART_RECEIVE_CHAR;// 将接收到的依次字符存放到USART_RX_BUF
     
175.                 USART_COUNT++;// Buffer中的指针后移
     
176.                 if((USART_RX_BUF[USART_COUNT-1]=='\n') && (USART_RX_BUF[USART_COUNT-2]=='\r')){// 判断是否读到了\r\n
     & P, F. A8 h8 u5 W( q
177.                         // 若已经读到了\r\n则Buffer中的数据即用户发送的数据且以\r\n结尾
     
178.                         // printf("Received Completed");
     1 l% G4 V2 _/ d3 P* N- h, n  k
179.                         USART_RECEIVECOMPLETED = 1;
     
180.                         // HAL_UART_Transmit(huart,USART_RX_BUF,sizeof(USART_RX_BUF),100); // 将Buffer中的内容传回给用户
     ( [2 {, }' Y9 D0 A: |
181.                         // memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
     
182.                         // memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
     ) S; U) ?5 L6 _( J: A" ]
183.                         // USART_COUNT = 0;// Buffer中的指针复位
     
184.                         // USART_COUNT = 0;
     - R+ \7 R$ T# n- Y
185.                 }
     
186.         }
     - a* c5 E- Z7 P4 {: f  J1 n) U# |% ^* C* p
187.         HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1);// 再次打开串口中断否则串口只能接收一个char字符
     
188. }
     
189. 
     
190. void ClearUSARTReceiveBuffer(void){
     5 X/ W9 W8 A6 W8 E3 A3 I
191.        
     
192.         USART_COUNT = 0;// Buffer中的指针复位
     + |% n" u- [( u# p* ~+ D; s4 Q: J
193.         USART_RECEIVECOMPLETED = 0; // 清除接收完成标志
     - F- Q5 S2 V! w2 V
194.         memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
     # ?" m% z1 u; n6 s# D6 L
195. }
     6 n4 l% V* Q; b$ F. w  [
196.                                
     . X$ P& D4 e( j- H
197. /* USER CODE END 1 */

复制代码

8 C! H  y' ]6 \8 {' z! F- T2 Jmain.c
9 s5 ^" A/ ^* \2 ^/ S# X9 G* U* N9 L8 M

1. /* USER CODE BEGIN Header */
   
2. /**
     |; [+ |8 T5 \; I* a- B4 B
3.   ******************************************************************************
   
4.   * @file           : main.c
   
5.   * @brief          : Main program body
   / q$ e) ^+ d2 y( i" Z5 E
6.   * @author         : Lihang Zhu
   , v- N, n* h8 g
7.   ******************************************************************************
   
8.   * @attention
   
9.   *
   . g) p- t7 M9 X/ W2 ?8 q
10.   * Copyright (c) 2022 STMicroelectronics.
    
11.   * All rights reserved.
    
12.   *
    
13.   * This software is licensed under terms that can be found in the LICENSE file
    3 m5 ^, G0 r2 L5 L
14.   * in the root directory of this software component.
      D( }! y' H8 s
15.   * If no LICENSE file comes with this software, it is provided AS-IS.
      t1 b% v  S5 D$ m# I% `" S
16.   *
    " o5 z. q! f# n
17.   ******************************************************************************
    + i+ |" N! B$ W# ]8 P3 h
18.   */
    
19. /* USER CODE END Header */
    
20. /* Includes ------------------------------------------------------------------*/
    - t" r9 u! x. |$ q/ Z
21. #include "main.h"
    
22. #include "adc.h"
    5 P6 i/ X( d5 s. u4 u' I+ `# z
23. #include "dac.h"
    
24. #include "dma.h"
    
25. #include "tim.h"
    
26. #include "usart.h"
    * P8 b; d1 Y; ^# W) `8 j. K" n
27. #include "gpio.h"
    
28. #include <stdio.h>
    
29. #include "cv.h"
      J; |/ H- b- |0 O1 R" e
30. /* Private includes ----------------------------------------------------------*/
    ! x& O( }2 K* u" t& G
31. /* USER CODE BEGIN Includes */
    
32.                  /*PB6---UART1_TX
    5 c1 M. E& P4 \% e. h# e+ p# Z
33.                          PA10---UART1_RX
    
34.                  
    4 k5 {8 l/ t, S" F. s/ |
35.                    PA0---ADC1_IN5
    ! o8 J& K/ a1 K5 f. W
36.                          PA1---ADC1_IN6
    / |' w6 Q- t) D5 h' @/ ?
37.                          PA2---ADC1_IN7
    0 D2 z$ W: Z: J  q
38.                          PA3---ADC1_IN8
    ; E# w/ z2 h  y# Y8 @$ G; J4 c5 Z
39.                          PA6---ADC1_IN11
    - l' L/ r* x0 w" O
40.                          PA7---ADC1_IN12
    8 u9 @. N/ \& F' K& m
41.                          PB0---ADC1_IN15
    . C  W3 R& T0 E9 t$ o3 |
42.                          PB0---ADC1_IN16
    8 ]3 `* V" r2 e3 A) E( Z
43.                          
    
44.                          PA4---DAC1_OUT1   程序输出 2048/4096*3.3= 1.65
    
45.                          PA5---DAC1_OUT2
    ; M+ L; `  ?, S4 O$ o3 F$ g: r6 Y3 X6 _
46.                  
    
47.                     PA15 LED灯进行翻转 亮灭
    
48.                 */
    ' }7 b8 D8 p8 E% c1 L
49. /* USER CODE END Includes */
    / g. E1 I; }2 N% J4 z$ @: s- Y
50. 
    6 i. o* J! O0 f/ ~: W& ~( r; \* ?
51. /* Private typedef -----------------------------------------------------------*/
    
52. /* USER CODE BEGIN PTD */
    
53. 
    # a6 c- \2 C2 |& q$ l1 n
54. // ADC Buffer 16bit
    
55. volatile  uint16_t ADC_Value[8];//存储数组
    
56. float ADC_RESULT = 0;  
    8 f7 @( }0 ~, G0 [& J* q
57. // USART Related Content
    5 ?. a7 ^# c) e! @! w/ j- z
58. // @author : Lihang Zhu
    
59. extern uint8_t USART_RECEIVE_CHAR;
    
60. extern uint8_t USART_RECEIVECOMPLETED;
    
61. extern uint8_t USART_COUNT;
    
62. extern uint8_t USART_RX_BUF[USART_REC_LEN];
    3 _( P+ W$ ?; [4 t
63. /* USER CODE END PTD */
    
64. 
    # t2 `/ e0 O% j$ M
65. /* Private define ------------------------------------------------------------*/
    # ?- Z- M& f! P- _* a
66. /* USER CODE BEGIN PD */
    
67. /* USER CODE END PD */
    . r7 t8 w/ |7 Y3 _
68. 
    4 u. E/ g/ X3 _: g
69. /* Private macro -------------------------------------------------------------*/
    ( y3 t' G5 w; T/ ]# I0 _$ V8 h
70. /* USER CODE BEGIN PM */
    
71. 
    
72. /* USER CODE END PM */
    : J2 R8 m  @+ u+ W
73. 
    
74. /* Private variables ---------------------------------------------------------*/
    ' b( X; k, U/ @1 c- q. e/ ]+ [
75. 
    & d# h! i- b5 H( `+ [8 Y
76. /* USER CODE BEGIN PV */
    ( b; a, z' V  m9 q# H# t
77. 
    5 y6 ]" l4 u' l2 x
78. /* USER CODE END PV */
    0 V' }$ j7 E# h4 A( a9 k% k2 t
79. 
    : L  j2 V! f2 p5 D* @
80. /* Private function prototypes -----------------------------------------------*/
    . L1 r! i& G; l& @
81. void SystemClock_Config(void);
    
82. /* USER CODE BEGIN PFP */
    
83. 
    
84. /* USER CODE END PFP */
    
85. 
    4 M8 z6 a: K6 e) v
86. /* Private user code ---------------------------------------------------------*/
    5 q7 H0 `( x  ^9 z9 F8 M* J% @
87. /* USER CODE BEGIN 0 */
    , w& k) @5 }0 k; W1 V! b0 Z
88. 
    
89. /* USER CODE END 0 */
    
90. 
    
91. /**
    
92.   * @brief  The application entry point.
    
93.   * @retval int
    1 c, L0 o; k, ~+ x1 F& J' A
94.   */
    ! `5 z5 c( D. U7 A# G/ |
95. int main(void)
    9 ~% ], Y* D" y; ~# i) V
96. {
    
97.   /* USER CODE BEGIN 1 */
    
98. 
    
99.   /* USER CODE END 1 */
    . x1 s( h; _# ~. Q2 Y" }7 s) P0 n
100. 
     
101.   /* MCU Configuration--------------------------------------------------------*/
     
102. 
     4 c, |4 |! s/ ]9 n
103.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
     
104.   HAL_Init();
     
105. 
     
106.   /* USER CODE BEGIN Init */
     
107. 
     6 c# y' X& }. {
108.   /* USER CODE END Init */
     6 V: M+ d6 O9 {6 g# N! c
109. 
     2 n' z% r, }, _+ k8 n: H% j& _: u
110.   /* Configure the system clock */
     
111.   SystemClock_Config();
     / G6 Q9 G! `1 B; p5 Q6 Y
112. 
     / d2 k& G" e, b9 l3 i' q6 D) Q; u5 A
113.   /* USER CODE BEGIN SysInit */
     ) S0 T6 y& Z# i
114. 
     
115.   /* USER CODE END SysInit */
     ' S! K. O" I% ^5 P9 i- U. }
116. 
     ; a' z9 t" n% o  Y! ~! W- k
117.   /* Initialize all configured peripherals */
     2 D9 L4 {! T3 [
118.   MX_GPIO_Init();
     
119.   MX_DMA_Init();
     
120.   MX_ADC1_Init();
     . u( z* D5 h- c* `+ j0 _( T3 u
121.   MX_TIM6_Init();
     
122.   MX_USART1_UART_Init();
     5 W: j# s# [' x, c2 k/ [% U0 w4 ?
123.   MX_DAC1_Init();
     + h! [( F1 F' g- U, V4 A
124.   /* USER CODE BEGIN 2 */
     $ \9 C% h7 z: J3 c2 k/ c4 c
125.         HAL_TIM_Base_Start_IT(&htim6);
     
126. 
     
127.   HAL_GPIO_WritePin(LED_Flsh_GPIO_Port, LED_Flsh_Pin, GPIO_PIN_RESET);
     
128.        
     
129.         HAL_ADCEx_Calibration_Start(&hadc1,ADC_SINGLE_ENDED);  //AD校准
     ; B3 @1 G9 ~( ?* E$ z1 c3 n' P, S% F; o
130.         HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_Value,8);// 强制转换为uint32_t
     
131.        
     
132. 
     
133.         Dac1_Set_Vol(1200); // PA4
     
134.        
     + ]; |: f% h* w% P7 C/ M; v
135.   /* USER CODE END 2 */
     
136. 
     3 v& p# b8 R4 G1 \3 s! ~
137.   /* Infinite loop */
     
138.   /* USER CODE BEGIN WHILE */
     + R2 a8 m) j0 O# X5 n9 @
139.         HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1);        //开启第一次中断
     
140.        
     
141.   while (1)
     
142.   {
       U) u& G6 O4 y3 z( R  S! k, V/ @9 a
143.     /* USER CODE END WHILE */
     
144. //                ADC_RESULT  = 3300000.0/4096.0*ADC_Value[0]/1000.0; printf("%f \r\n",ADC_RESULT);
     + j9 ~6 M+ d9 A. U% Z7 P2 W
145. //                HAL_Delay(300);
     
146.     /* USER CODE BEGIN 3 */
     ( p1 }6 n2 p- v! {6 G1 ~) C
147.                 // printf("Hello");
     0 W4 g# |; j! w" Q0 Z$ v
148.                
     
149.                
     
150. //                int i = 200;
     3 {3 _% A4 N7 |6 X# c8 R. q
151. //                if(i>=0){
     
152. //                        CV_setting1();
     7 r" o$ B# l" Z3 x: g% G
153. //                        i--;
     
154. //                }
     " Z( ~8 V! [5 ?3 O9 k
155.                
     & b/ q" j- I2 [' v- H9 {) g
156.   }
     
157.   /* USER CODE END 3 */
     % L5 J6 _' `2 H( X
158. }
     
159. 
     8 @) ~% C& o, C+ j" f, z- l: ~
160. /**
     6 _  t/ A# ~9 F  t( x, a' k8 U
161.   * @brief System Clock Configuration
     
162.   * @retval None
     & B* K) z: B) L. k% n+ }$ H2 P2 R
163.   */
     
164. void SystemClock_Config(void)
     , a! v& ~; B. I1 {1 v5 H
165. {
     - e9 f6 L6 w) u. ?2 `
166.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     * _" T) L' ], S( \" {2 t& _2 H, o
167.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
     
168. 
     0 e5 n( x% N# N, E$ ~
169.   /** Configure the main internal regulator output voltage
     1 F% s. Y5 h2 \- x1 `( l* y5 |
170.   */
     & z9 A- e3 M+ T4 o" M
171.   if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
     # m) a* {2 |  m2 Q
172.   {
     1 m0 H% J$ B, Y+ X- X
173.     Error_Handler();
     9 s. \' `" f' Q5 W3 H
174.   }
     # m" B) X& k, N# J; Z5 a: c: C. }
175. 
     2 S7 P" F5 `2 ~
176.   /** Initializes the RCC Oscillators according to the specified parameters
     
177.   * in the RCC_OscInitTypeDef structure.
     ( d7 l, h* l& e* `1 ?1 V
178.   */
     $ _; F5 r- z4 g* \: m  n
179.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
     + c/ x, k& x# R, u8 R
180.   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
     ( t8 l% R9 }" E: `  x9 v
181.   RCC_OscInitStruct.MSICalibrationValue = 0;
     
182.   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
     
183.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     4 w: D/ \" D4 r1 c3 _4 s* I( U' X% [
184.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
     / m3 y7 e& h$ x1 ~
185.   RCC_OscInitStruct.PLL.PLLM = 1;
     
186.   RCC_OscInitStruct.PLL.PLLN = 40;
     
187.   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
       z  _0 k, d0 {, B" z1 O0 X
188.   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
     0 d' u1 @& r% w! j3 ?
189.   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
     1 h2 H* W3 k1 B5 j5 ^. c' t
190.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
191.   {
     
192.     Error_Handler();
     + z: C" p' r6 `
193.   }
     
194. 
     . \, N6 _! E3 S
195.   /** Initializes the CPU, AHB and APB buses clocks
     5 t' r3 d; v7 `' v1 @% I
196.   */
     
197.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     0 k1 v2 K6 C' j* O1 q; H' b/ _# [
198.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     ' C1 |7 z+ @; |
199.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
200.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     ( p1 d1 s$ j7 n
201.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     : i% u) n* v5 p% t5 k
202.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     
203. 
     : I2 z! G. I8 D  R" w
204.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
     
205.   {
     * T% f/ `  r. B( j' t0 r! d: e2 @* j
206.     Error_Handler();
     
207.   }
     " M5 U& R/ d. x' B4 ^1 Y* I8 J
208. }
     
209. 
     
210. /* USER CODE BEGIN 4 */
     
211. 
     3 {/ u& N  o/ u; d% Q
212. /* USER CODE END 4 */
     5 ^; k& b2 B  n' x: }# H5 @
213. 
       y; K7 D# u0 v- ?/ q* ~
214. /**
     
215.   * @brief  This function is executed in case of error occurrence.
     ! T# Q5 r( ~& e& m0 w
216.   * @retval None
     ' B0 d0 Y& ~/ Q* r" u( L' r
217.   */
     
218. void Error_Handler(void)
     : c; _! m4 ~. H2 J
219. {
     
220.   /* USER CODE BEGIN Error_Handler_Debug */
     
221.   /* User can add his own implementation to report the HAL error return state */
       C7 U! N1 d. Y2 u5 p* U2 Q2 q
222.   __disable_irq();
     / q5 V# l  c8 L6 d) u" d# V4 O/ p
223.   while (1)
     , y! w' c8 {8 p  d9 R9 U* ?
224.   {
     
225.   }
     
226.   /* USER CODE END Error_Handler_Debug */
       g- T: S7 A" `% W. C
227. }
     
228. 
     1 W" G' C  s  B" a# t! v
229. #ifdef  USE_FULL_ASSERT
     
230. /**
     & A$ j9 F% k3 `7 x9 l& F: `1 y
231.   * @brief  Reports the name of the source file and the source line number
     
232.   *         where the assert_param error has occurred.
     
233.   * @param  file: pointer to the source file name
     
234.   * @param  line: assert_param error line source number
     
235.   * @retval None
     
236.   */
     & [( q0 _7 p6 {; }; S0 }& I$ Y
237. void assert_failed(uint8_t *file, uint32_t line)
     
238. {
     
239.   /* USER CODE BEGIN 6 */
     8 g  Y5 I6 C3 O! R; E
240.   /* User can add his own implementation to report the file name and line number,
       A7 U6 z0 O3 T; }* I
241.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
242.   /* USER CODE END 6 */
     % J' q$ @* t. u) J! Z4 n
243. }
     
244. #endif /* USE_FULL_ASSERT */

复制代码

使用USART中断接收数据，记得要在while前开启USART中断

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! y! h, M, ?7 V此外，这里也要再次开启中断

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注意：每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数，我们将将接收到的依次字符按照收到的顺序从低到高存放到USART_RX_BUF中
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我们可以通过USART_RECEIVECOMPLETED判断USART1是否读取到了完整的数据

2 S+ x% T  F. p( E' o& H. y6 G读取到的数据存放在USART_RX_BUF中

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STM32Cube的时钟配置
配置时钟信号为80 MHz
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注意：时钟频率过低会影响printf等函数的功能
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( C: W, Y7 C( @7 H
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( S' d4 [4 R- gSTM32的8通道ADC配置
0 t! s" B% C7 C2 O) [STM32Cube的ADC配置

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3 c+ }) r- R$ d$ X0 w
! O+ m3 {3 B6 [; F1 a3 W1 }STM32Cube的DMA配置
5 ]  H/ n! i! P1 b7 r! P配置为DMA通道1
- s/ s$ y7 A+ a6 R8 y
- Z$ O! ]9 L% R! n% Y! Z& ]

$ z4 V3 y7 S, S: h8 B设置DMA的循环搬运

, {( p) y2 ~5 I) m# n' y% @
0 \) l  H; Q6 Z2 y  A6 F5 \2 d
开启DMA中断
" _, F: R/ {; N. X& y/ r
2 D- y. X) C3 p1 U' e8 D

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ADC的DMA中断
DMA的中断服务函数可以通过以下方式寻找
8 A( S. {  T" a# S
4 X; o2 I( N! E首先在.s启动文件中找到对应的中断服务函数
$ x; i! d: ], x( m/ _( p
# f; ^# O* K/ ~- i8 C& C: e, o
3 l, }1 ~) ?! k
" V& @" o' c. n1 L; ^) ?可以看到，其调用了HAL_DMA_IRQHandler函数


" @+ G' [: Z6 ?+ S. Q6 i
3 Y% I/ F/ J0 `2 \( ?继续跳进去





) y$ H9 I( H6 R; {; ?6 p9 _这里的XferCpltCallback是一个函数指针，我们看一下他的定义

# ^, ~- T! k! j1 T

/ @8 f" r; K: z; J% k9 J4 \这个函数指针成员到底指向了什么，你直接去追是追不到的，实际上在DMA启动之后会为这个成员赋值。

这个赋值的操作是在HAL_ADC_Start_DMA函数中完成的



这个ADC_DMAConvCplt就是ADC DMA的回调函数


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  ^# @, m" r1 R2 c. o6 G
1 w* x  h+ \; L
这个ADC_DMAConvCplt回调函数最终是调用这个

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也就是这个HAL_ADC_ConvCpltCallback函数，这个中断处理函数是weak的，因此我们可以进行重写
4 E0 i  ?3 K3 r
: @$ o. v2 v  z% z& U# Q

我们把这个函数在adc.c文件中重写一下
- I/ f/ C5 q( q2 P
  r/ E6 u" w5 O  T6 h* I9 N* A: W

' c2 I9 c6 B9 o3 L) A5 t可以在里面关闭DMA，这样一次ADC转换DAM存放完成后就结束了

# \1 l3 H6 i, Y* K如果需要开始下一次，直接调用HAL_ADC_START

' l" m0 u( N; t* r

' l4 x! u# B4 h" \0 J- \- {8 Z( D$ a————————————————
版权声明：CodeForCoffee
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